1use crate::{ffi, Cursor, Texture};
4use glib::translate::*;
5use std::boxed::Box as Box_;
6
7impl Cursor {
8 #[cfg(feature = "v4_16")]
22 #[cfg_attr(docsrs, doc(cfg(feature = "v4_16")))]
23 #[doc(alias = "gdk_cursor_new_from_callback")]
24 #[doc(alias = "new_from_callback")]
25 pub fn from_callback<
26 P: Fn(&Cursor, i32, f64, &mut i32, &mut i32, &mut i32, &mut i32) -> Texture + 'static,
27 >(
28 callback: P,
29 fallback: Option<&Cursor>,
30 ) -> Option<Cursor> {
31 assert_initialized_main_thread!();
32 let callback_data: Box_<P> = Box_::new(callback);
33 unsafe extern "C" fn callback_func<
34 P: Fn(&Cursor, i32, f64, &mut i32, &mut i32, &mut i32, &mut i32) -> Texture + 'static,
35 >(
36 cursor: *mut ffi::GdkCursor,
37 cursor_size: libc::c_int,
38 scale: libc::c_double,
39 width: *mut libc::c_int,
40 height: *mut libc::c_int,
41 hotspot_x: *mut libc::c_int,
42 hotspot_y: *mut libc::c_int,
43 data: glib::ffi::gpointer,
44 ) -> *mut ffi::GdkTexture {
45 let cursor = from_glib_borrow(cursor);
46 let callback = &*(data as *mut P);
47 (*callback)(
48 &cursor,
49 cursor_size,
50 scale,
51 &mut *width,
52 &mut *height,
53 &mut *hotspot_x,
54 &mut *hotspot_y,
55 )
56 .to_glib_none()
58 .0
59 }
60 let callback = Some(callback_func::<P> as _);
61 unsafe extern "C" fn destroy_func<
62 P: Fn(&Cursor, i32, f64, &mut i32, &mut i32, &mut i32, &mut i32) -> Texture + 'static,
63 >(
64 data: glib::ffi::gpointer,
65 ) {
66 let _callback = Box_::from_raw(data as *mut P);
67 }
68 let destroy_call2 = Some(destroy_func::<P> as _);
69 let super_callback0: Box_<P> = callback_data;
70 unsafe {
71 from_glib_full(ffi::gdk_cursor_new_from_callback(
72 callback,
73 Box_::into_raw(super_callback0) as *mut _,
74 destroy_call2,
75 fallback.to_glib_none().0,
76 ))
77 }
78 }
79}